Irwin Unibit Step Drills 7 Hole Sizes (6mm-18mm).
- Single flute for maximum drilling control into sheet metal.
- Unique flute design ensures perfect round holes in sheet metal.
- Self-centring point: will not walk eliminates centre punching.
- Flatted shank prevents the drill bit from slipping in the chuck.
- Made from industrial grade M7 high-speed steel.
|Descriptions||3M 7 Hole Sizes (6mm - 18mm), 2mm increments|